https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109788
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- If you e.g. put breakpoint on the spot I changed and stopon the testcase with -Os when t == global_trees[TI_VOID_LIST_NODE] you can then see in e->callee the FUNCTION_TYPE with just 5 arguments.